1. Ibekwe VC, Kendall RA, Basit AW. Drug delivery to the colon. Drug delivery companies report (Spring/Summer). Oxford (UK): Pharma Ventures Ltd; 2004. p. 27.
2. Chourasia MK, Jain SK. Pharmaceutical approaches to colon targeted drug delivery systems. J Pharm Pharmaceut Sci. 2003;6:33–66.
3. Sinha VR, Kumria R. Microbially triggered drug delivery to the colon. Eur J Pharm Sci. 2003;18:3–18.
4. Aritomi H, Yamasaki Y, Yamada K, Honda H, Koshi M. Development of sustained release formulation of chlorpheniramine maleate using powder coated microsponges prepared by dry impact blending method. J Pharmaceutical Sci and Tech. 1996;56:49–56.
5. Lamprecht A, Yamamoto H, Takeuchi H, Kawashima Y. Microsphere design for the colonic delivery of 5-fluorouracil. J Control Release. 2003;90:313–22.